This video is part two of a seven part series on the GM 8L90 transmission. In this video, I cover the mechanical operation and powerflow. I describe the transmission identification, gearset components, clutch assemblies and I describe powerflow in each gear.

Here are the other videos in this series:

8L90 Overhaul part one covers disassembly:    • General Motors 8l90 Overhaul Part One...  
8L90 Overhaul part two covers assembly, including clutch and gearset assembly and measurements:    • General Motors 8l90 Overhaul Part Two...  
8L90 Overhaul part three covers valve body:    • General Motors 8L90 mechanical operat...  

8L90 Hydraulics theory and operation:    • General Motors 8L90 hydraulic operation  
8L90 Electrical theory and operation:    • General Motors 8L90 electrical theory...  
8L90 Torque Converter:    • General Motors 8L90 torque converter ...  
8L90 Rebuilding Particulars:
8L90 Modifications and Tuning:

Special thanks to Precision International, TransGo, and Sonnax for providing me with product to use in these videos. Also thanks to KB Cores and AA Midwest for providing me with a few 8L90 cores at a good price!